EP3641438A1 - Terminal d'utilisateur, et procédé de communication sans fil - Google Patents

Terminal d'utilisateur, et procédé de communication sans fil Download PDF

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Publication number
EP3641438A1
EP3641438A1 EP17913575.1A EP17913575A EP3641438A1 EP 3641438 A1 EP3641438 A1 EP 3641438A1 EP 17913575 A EP17913575 A EP 17913575A EP 3641438 A1 EP3641438 A1 EP 3641438A1
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EP
European Patent Office
Prior art keywords
control
downlink
information
control resource
resource set
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP17913575.1A
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German (de)
English (en)
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EP3641438B1 (fr
EP3641438A4 (fr
Inventor
Kazuki Takeda
Satoshi Nagata
Qin MU
Liu Liu
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NTT Docomo Inc
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NTT Docomo Inc
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Publication of EP3641438A4 publication Critical patent/EP3641438A4/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0067—Rate matching
    • H04L1/0068—Rate matching by puncturing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services

Definitions

  • the present invention relates to a user terminal and a radio communication method in next-generation mobile communication systems.
  • LTE long term evolution
  • LTE-A LTE advanced and LTE Rel. 10, 11, 12 and 13
  • LTE Rel. 8 and 9 LTE Rel. 8 and 9
  • downlink (DL) and/or uplink (UL) communication are performed using 1-ms subframes (also referred to as “transmission time intervals (TTIs)" and so on).
  • TTIs transmission time intervals
  • These subframes are the time unit for transmitting 1 channel-encoded data packet, and serve as the unit of processing in, for example, scheduling, link adaptation, retransmission control (HARQ (Hybrid Automatic Repeat reQuest)) and so on.
  • HARQ Hybrid Automatic Repeat reQuest
  • each control channel element is comprised of a number of resource element groups (REGs/EREGs). Resource element groups are also used when control channels are mapped to resource elements (REs).
  • Non-Patent Literature 1 3GPP TS36.300 V8.12.0 "Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall Description; Stage 2 (Release 8)," April, 2010
  • E-UTRA Evolved Universal Terrestrial Radio Access
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • a user terminal has a receiving section that receives a downlink signal and a control section that, when the downlink signal is different from a signal that represents downlink control information, and a radio resource of the downlink signal overlaps a monitoring field for downlink control channel detection, applies a predetermined control to the monitoring field for downlink control channel detection.
  • the present invention it is possible to suppress the decline in the quality of communication and/or reduction of utilization efficiency of resources even in the case of flexibly arranging an area for transmitting downlink control information.
  • DCI may be scheduling information to include at least one of, for example, time/frequency resources for scheduling data, transport block information, data modulation scheme information, HARQ retransmission information, and information related to demodulation RS.
  • DCI that schedules receipt of DL data and/or measurements of DL reference signals may be referred to as "DL assignment” or "DL grant,” and DCI that schedules transmission of UL data and/or transmission of UL sounding (measurement) signals may be referred to as "UL grant.”
  • DL assignment and/or UL grant may carry information related to at least one of the resource, sequence, transmission format and so on of the channel for transmitting UL control signals (UCI (Uplink Control Information)) such as HARQ-ACK feedback and/or channel measurement information (CSI (Channel State Information)) in response to DL data, and so on.
  • UCI Uplink Control Information
  • CSI Channel State Information
  • DCI to schedule UL control signals may be defined apart from DL assignment and UL grant.
  • the UE monitors a set of a predetermined number of downlink control channel candidates based on configurations.
  • To “monitor” in this case means, for example, attempting to decode every downlink control channel in this set, with respect to a target DCI format.
  • Such decoding is also referred to as “blind decoding (BD)” or “blind detection.”
  • BD candidate may be referred to as a "BD candidate,” a “(E)PDCCH candidate,” and so on.
  • a set of downlink control channel candidates (multiple downlink control channel candidates) to be monitored is also referred to as a "search space.”
  • a base station allocates DCI in a predetermined downlink control channel candidate included in the search space.
  • the UE performs blind decoding for one or more candidate resources in the search space, and detects DCI addressed to the UE.
  • the search space may be configured by high layer signaling that is common between users, or may be configured by user-specific high layer signaling. Also, two or more search spaces may be configured for a user terminal, in the same carrier.
  • AL aggregation levels
  • CCEs control channel elements
  • ECCEs encoded control channel elements
  • search space is configured so that there are multiple downlink control channel candidates for a given AL.
  • Each downlink control channel candidate is comprised of one or more resource units (CCEs and/or ECCEs).
  • a search space may be a common search space, which is configured for UEs on a shared basis, or a UE-specific search space, which is configured for an individual UE.
  • a numerology refers to communication parameters related to the frequency domain and/or the time domain (for example, at least one of the subcarrier spacing (SC'S), the bandwidth, the length of symbols, the length of cyclic prefixes (CPs), the length of transmission time intervals (TTIs), the number of symbols per TTI, the format of radio frames, the filtering process, the windowing process and so on).
  • SC'S subcarrier spacing
  • CPs the length of symbols
  • TTIs transmission time intervals
  • the number of symbols per TTI the format of radio frames
  • the filtering process the windowing process and so on.
  • future radio communication systems for example, 5G, NR, etc.
  • 5G/NR are under study to provide radio communication services referred to as "eMBB (enhanced Mobile Broad Band),” “Iota (Internet of Things),” “mMTC (massive Machine Type Communication),” “M2M (Machine To Machine),” “RLC (Ultra Reliable and Low Latency Communications),” and so on.
  • eMBB enhanced Mobile Broad Band
  • Iota Internet of Things
  • mMTC massive Machine Type Communication
  • M2M Machine To Machine
  • RLC User Reliable and Low Latency Communications
  • UE can detect a downlink control channel (or a control channel for NR (NR-PDCCH)) by monitoring a predetermined control resource set.
  • a control resource set refers to a set of candidate resources for transmitting a downlink control channel, and may be referred to as a "CORSET (Control Resource SET),” a "control subband,” a “control channel search space,” a “search space set,” a “search space resource set,” a “control field,” a “control subband,” an "NR-PDCCH field,” and so on.
  • a control resource set may be one that is needed to receive minimum system information (which may be referred to as, for example, "RIMS (Remaining Minimum System Information)").
  • RIMS Remaining Minimum System Information
  • Control resource sets when allocated in a flexible manner as described above, might content (collide) with information or signals that are allocated apart from downlink control information or from information for detecting downlink control information. Consequently, it may not be possible to allocate downlink control channels in control resource sets. In this case, the UE monitors control resource sets, but might even decode resources to which no downlink control information is mapped. For this reason, a decline in the quality of communication, a drop in resource efficiency and the like might pose problems. Note that the locations to map control resource sets may be reported in advance from the network side to the UE by using higher layer signaling or the like.
  • control resource sets are allocated to the first, third, fifth and seventh symbols in time-frequency resources.
  • broadcast information is allocated to resource for a control resource set. Consequently, although UE monitors the control resource set, given that no downlink control channel (downlink control information) is mapped in the colliding resource, the UE ends up performing unnecessary processes.
  • mapping locations of a control resource set (monitoring area for downlink control channel detection) that is arranged in a flexible manner (for example, quasi-statically arranged) and information or signals other than downlink control information collide
  • the present inventors have focused on the handling of the control resource set, and arrived at the present invention.
  • radio communication methods according to the herein-contained embodiments may be used individually or may be used in combination.
  • the broadcast information may carry a broadcast channel (PBCH (Physical Broadcast CHannel)) and synchronization signals (for example, the PSS (Primary Synchronization Signal)/SSS (Secondary Synchronization Signal)) that are transmitted in predetermined resource locations (symbol and frequency resources), or may carry resource units (for example, SS (Synchronization Signal) blocks) comprised of a broadcast channel and synchronization signals.
  • PBCH Physical Broadcast CHannel
  • synchronization signals for example, the PSS (Primary Synchronization Signal)/SSS (Secondary Synchronization Signal)
  • resource units for example, SS (Synchronization Signal) blocks
  • example 1-2 will be described below. According to example 1-2, UE does not monitor (skips monitoring) control resource sets that collide with broadcast information.
  • control resource sets illustrated in FIG. 3 are configured in the first, third, fifth and seventh symbols. However, as in FIG. 1 and FIG. 2 , in the third symbol, the control resource set collides with broadcast information.
  • control resource sets are reported to (or configured semi-statically in) UE, in advance, by higher layer signaling or the like.
  • the location of the broadcast information may be configured semi-statically, similar to the control resource sets, or may be determined in advance in the specification.
  • the UE detects (specifies) the control resource set that collides with the broadcast information, based on information to indicate locations that are reported or determined in advance.
  • the UE skips monitoring only the detected control resource set. To be more specific, in FIG. 3 , the monitoring of the control resource set configured in the third symbol is skipped.
  • the UE does not perform monitoring, decoding process and so forth, only for control resource sets that collide with broadcast information, thereby avoiding unnecessary processes, and reducing the terminal's battery consumption.
  • control resource sets are configured in a flexible manner, it is still possible to reduce the decline in the quality of communication, the drop in resource efficiency, and so forth.
  • example 1-3 a control resource set that collides with broadcast information is shifted in the time-axis direction, and prevented from colliding with the broadcast information.
  • a control resource set that collides with broadcast information can be shifted to an effective resource that does not collide with broadcast information. Consequently, UE does not perform monitoring, decoding processes and so forth, for resources that collide with broadcast information, thereby avoiding unnecessary processes.
  • the downlink control channel that is mapped to the colliding control resource set is mapped to a resource (effective resource) that does not collide with broadcast information, so that the drop in resource efficiency and the like can be reduced. Furthermore, there is no need to wait for the next control resource set of the colliding control resource set to transmit a downlink control channel, so that the latency in transmission and so on can be reduced.
  • the amount of shift in the time-axis direction is 1 symbol, but this is by no means limiting.
  • a control resource set may be shifted to a resource that is located on one of the intervening symbols and that does not collide with broadcast information.
  • example 1-4 will be described below.
  • the control resource set that collides with the broadcast information is shifted in the direction of the frequency axis and prevented from colliding with the broadcast information.
  • control resource sets are configured in the first, third, fifth and seventh symbols, but, in the third symbol, the control resource set collides with broadcast information.
  • the network knows in advance that broadcast information and the control resource set of the third symbol will collide, so that the network maps the broadcast information to the third symbol, and configures the colliding control resource set by shifting the control resource set in the frequency direction so as not to collide with the broadcast information.
  • the downlink control channel that is mapped to the colliding control resource set is mapped to a resource (effective resource) that does not collide with broadcast information, so that the drop in resource efficiency and the like can be reduced. Furthermore, there is no need to wait for the next control resource set of the colliding control resource set to transmit a downlink control channel, or there is no need to transmit the downlink control channel in a symbol after the colliding symbol, so that the latency in transmission and so on can be reduced.
  • control resource set may be pre-configured in UE, or reported from the network.
  • example 1-5 when a control resource set collides with broadcast information, the part (resource) that collides with broadcast information is not considered as the control resource set, and only the part (resource) that does not collide (does not overlap) with the broadcast information is regarded as the control resource set and monitored.
  • control resource sets are configured in the first, third, fifth and seventh symbols, but, in the third symbol, the control resource set collides with broadcast information.
  • Downlink control channel elements are comprised of a number of resource element groups (REGs/EREGs). Resource element groups are also used when downlink control channels are mapped to resource elements (REs).
  • REGs/EREGs resource element groups
  • Resource element groups are also used when downlink control channels are mapped to resource elements (REs).
  • a control resource set is comprised of 30 REGs. However, since the part (resource) that collides with broadcast information is not considered as a control resource set, no REG index is assigned.
  • parts (resources) where there is no colliding (overlapping) broadcast information are regarded as control resource sets, and therefore, REG indices are assigned. That is, the REGs with REG indices 1 to 24 are considered as a control resource set, and a downlink control channel can be allocated (mapped). That is, in the network, the REGs with REG indices 1 to 24 can be used to map a downlink control channel. Note that, referring to FIG. 6 , the part (resource) that collide with broadcast information is not considered as the control resource set, and therefore the REG index 14 and the REG index 15 are assigned in a discontinuous manner.
  • the UE detects (specifies) the control resource set that collides with the broadcast information, based on information to indicate locations that are reported or determined in advance.
  • the UE monitors only the portion of the detected control resource set that does not collide (do not overlap) with broadcast information.
  • the UE performs monitoring in the CCE (per resource) associated to REG index 1-24.
  • a downlink control channel can be allocated using resources that do not collide (do not overlap) with broadcast information.
  • the colliding control resource set can be utilized. Consequently, UE does not perform monitoring, decoding processes and so forth, for resources that collide with broadcast information, thereby avoiding unnecessary processes.
  • control resource sets are configured in a flexible manner, it is still possible to reduce the decline in the quality of communication, the drop in resource efficiency, and so forth.
  • indices to assign to parts that do not collide (do not overlap) with broadcast information may be configured in advance, or reported from the network.
  • example 1-6 when a control resource set collides with broadcast information, the part (resource) that collides with broadcast information is also regarded as the control resource set and monitored. Also, in example 1-6, rate matching or puncturing is applied.
  • a control resource set is comprised of 30 REGs.
  • the part (resource) that collides with broadcast information is also considered as a control resource set and is processed in UE, and therefore REG indices are assigned to all of the 30 REGs.
  • the network first maps a downlink control channel on the assumption that the corresponding downlink control channel does not overlap with broadcast information.
  • it is decided to map the downlink control channel to REG indices 11 to 16 (selection of mapping resources). After this, broadcast information is mapped, but since the broadcast information overlaps with the downlink control channel in REG indices 15 and 16, the broadcast information (REG indices 15 to 20) is subjected to rate matching.
  • the UE detects (specifies) the control resource set that collides with the broadcast information, based on information to indicate locations that are reported or determined in advance.
  • the UE may be engaged in monitoring, in the detected control resource set, by using REG indices 1 to 30. However, in the detected control resource set, the downlink control channel and the broadcast information overlap in REG indices 15 and 16, and therefore the broadcast information is subjected to rate matching.
  • Rate matching here refers to controlling the number of encoded bits by taking into account the radio resources that are actually available for use. At least part of the encoded bits may be repeated if the number of encoded bits is less than the number of bits that can be mapped to radio resources that are actually available. If the number of encoded bits is greater than the number of bits that can be mapped, then part of the encoded bits may be deleted.
  • puncturing may also be possible to use puncturing instead of rate matching.
  • puncturing although coding is performed without taking into account the amount of radio resources that are not available for use, among the radio resources broadcast information is allocated, encoded symbols are not mapped to resources that are not actually available (for example, REG indices 15 and 16).
  • the decoding process and/or other processes may be performed, using the broadcast information as information mapped to that control resource set.
  • the UE can perform the monitoring process, without performing special processes (such as partial monitoring, shifting radio resources, etc.) for colliding control resource sets. As a result of this, even when control resource sets are configured in a flexible manner, it is still possible to reduce the decline in the quality of communication, the drop in resource efficiency, and so forth.
  • UE does not monitor (skips monitoring) control resource sets that collide with downlink data. This is similar to example 1-2 above.
  • control resource sets illustrated in FIG. 8 are configured in the first, third, fifth and seventh symbols. However, in the third symbol, the control resource set collides with broadcast information.
  • control resource sets are reported to (or configured semi-statically in) UE, in advance, by higher layer signaling or the like.
  • location of downlink data in radio resources is specified by the downlink control channel (downlink control information) transmitted in the control resource set of the first symbol, and configured semi-statically.
  • the UE detects (specifies) the control resource set that collides with downlink data based on information that indicates these semi-statically-configured locations.
  • the UE skips monitoring only the detected control resource set. To be more specific, in FIG. 3 , the UE skips monitoring the control resource set configured in the third symbol.
  • example 2-2 will be described below.
  • colliding control resource sets are also monitored and subjected to rate matching or puncturing.
  • control resource sets are configured in the first, third, fifth and seventh symbols, but, in the third symbol, the control resource set collides with broadcast information. Also, the location of downlink data in radio resources is specified by the downlink control channel (downlink control information) transmitted in the control resource set of the first symbol.
  • FIG. 9 illustrates an example of a configuration in which rate matching or puncturing is applied to portions where the control resource set and the downlink data overlap (option 1).
  • FIG. 10 illustrates an example of a configuration in which rate matching or puncturing is applied to downlink control information (DCI) of a control resource set (option 2).
  • DCI downlink control information
  • the network first maps a downlink control channel (control resource set) on the assumption that the downlink control channel does not overlap with downlink data (selection of mapping resources). After this, downlink data is mapped, but, since the control resource set overlaps with downlink data, the downlink data is subjected to rate matching.
  • the UE detects (specifies) the control resource set that collides with the downlink data based on information indicating semi-statically-configured locations.
  • the UE monitors the detected control resource set.
  • the detected control resource set has a part that overlaps with downlink data, and therefore downlink data around the overlapping part is subjected to rate matching ( FIG. 9 ).
  • puncturing may be used instead of rate matching.
  • puncturing is applied to downlink data that is configured semi-statically, although part of the downlink data may not be transmitted, it is still preferable because the downlink data can be transmitted without making the transmission quality of the rest of the downlink data drop, and, furthermore the processes at the receiver can be made common depending on whether or not puncturing is used.
  • the UE detects (specifies) the control resource set that collides with the downlink data based on information indicating semi-statically-configured locations.
  • the UE monitors the detected control resource set. As a result of this, the DCI is decoded.
  • downlink data around the DCI is subjected to rate matching ( FIG. 10 ).
  • Puncturing is used instead of rate matching, as described earlier (option 1).
  • example 2-2 when a control resource set overlaps with downlink data, the monitoring process can be performed as when there is no overlap. As a result of this, even when control resource sets are configured in a flexible manner, it is still possible to reduce the decline in the quality of communication, the drop in resource efficiency, and so forth.
  • example 2-3 will be described below.
  • the part (resource) that collides with downlink data is not considered as the control resource set, and only the part (resource) that does not collide (does not overlap) with downlink data is regarded as the control resource set and monitored.
  • the behaviors of the network and UE are the same as in example 1-5, except that broadcast information and downlink data are different, and therefore their description will be omitted.
  • a downlink control channel can be allocated using resources that do not collide (do not overlap) with downlink data.
  • colliding control resource sets can be utilized. Consequently, UE does not perform monitoring, decoding processes and so forth, for resources that collide with downlink data, thereby avoiding unnecessary processes.
  • control resource sets are configured in a flexible manner, it is still possible to reduce the decline in the quality of communication, the drop in resource efficiency, and so forth.
  • example 2-4 will be described below.
  • example 2-4 as in example 1-6, when a control resource set collides with downlink data, the part (resource) that collides with downlink data is also regarded as the control resource set and monitored. Also, in example 2-4, rate matching or puncturing is applied ( FIG. 12 ).
  • the behaviors of the network and UE are the same as in example 1-6, except that broadcast information and downlink data are different, and therefore their description will be omitted.
  • the decoding process and/or other processes may be performed, using the downlink data as information mapped to that control resource set.
  • the UE can perform the monitoring process, without performing special processes (such as partial monitoring, shifting radio resources, etc.) for colliding control resource sets. As a result of this, even when control resource sets are configured in a flexible manner, it is still possible to reduce the decline in the quality of communication, the drop in resource efficiency, and so forth.
  • example 2-5 will be described below.
  • a control resource set that collide with downlink data is shifted in the time-axis direction, and prevented from colliding with downlink data ( FIG. 13 ).
  • the behaviors of the network and UE are the same as in example 1-3, except that broadcast information and downlink data are different, and therefore their description will be omitted.
  • a downlink control channel that is mapped to a colliding control resource set is mapped to a resource that does not collide with downlink data (effective resource), so that the drop in resource efficiency can be reduced. Furthermore, there is no need to wait for the next control resource set of the colliding control resource set to transmit a downlink control channel, so that the latency in transmission and so on can be reduced.
  • example 2-6 will be described below.
  • a control resource set that collide with downlink data is shifted in the frequency-axis direction, and prevented from colliding with downlink data ( FIG. 14 ).
  • the behaviors of the network and UE are the same as in example 1-4, except that broadcast information and downlink data are different, and therefore their description will be omitted.
  • a control resource set that collides with downlink data can be shifted to an effective resource that does not collide with downlink data. Consequently, the UE does not perform monitoring, decoding process and so forth, for resources that collide with downlink data, thereby avoiding unnecessary processes.
  • a downlink control channel that is mapped to a colliding control resource set is mapped to a resource that does not collide with downlink data (effective resource), so that the drop in resource efficiency can be reduced. Furthermore, there is no need to wait for the next control resource set of the colliding control resource set to transmit a downlink control channel, or there is no need to transmit the downlink control channel in a symbol after the colliding symbol, so that the latency in transmission and so on can be reduced.
  • control resource sets are allocated in a flexible manner and control sets collide with downlink data, it is still possible to reduce the decline in the quality of communication, the drop in resource efficiency and so forth.
  • radio resources symbols
  • the uplink may be configured dynamically. Consequently, as illustrated in FIG. 15 , a symbol to which a control resource set is allocated may be used for the uplink.
  • the UE detects (specifies) that, a symbol to which a control resource set is allocated is used for the uplink, based on information indicating locations that are reported or determined in advance, and uplink commands that are reported on a dynamic basis.
  • the UE skips monitoring only the detected control resource set. To be more specific, in FIG. 15 , the UE skips monitoring the control resource set configured in the seventh symbol.
  • the UE if a symbol to which a control resource set is allocated is used for the uplink, the UE does not perform monitoring, decoding processes and so forth, only for the corresponding control resource set, thereby avoiding unnecessary processes. As a result of this, even when control resource sets are configured in a flexible manner, it is still possible to reduce the decline in the quality of communication, the drop in resource efficiency, and so forth.
  • CSI-RS channel state information reference signal
  • example 4-1 will be described below.
  • example4-1 as in example 1-6, example 2-2 and example 2-4, when a control resource set collides with a CSI-RS, the part (resource) that collides with the CSI-RS is regarded as the control resource set and monitored ( FIG. 16 ). Also, in example 1-6, rate matching or puncturing is applied.
  • the behaviors of the network and the UE are the same as in example 1-6, example 2-2 and example 2-4, except that broadcast information and the CSI-RS are different, and therefore their description will be omitted.
  • a CSI-RS when allocated to collide with a control resource set, is subjected to decoding and other processes as information that is mapped to the control resource set.
  • UE can perform the monitoring process, without performing special processes (such as partial monitoring, shifting radio resources, etc.) for the colliding control resource set alone.
  • special processes such as partial monitoring, shifting radio resources, etc.
  • example 4-2 will be described below.
  • a colliding control resource set is shifted in the time-axis direction, and prevented from colliding with a CSI-RS ( FIG. 17 ).
  • the behaviors of the network and UE are the same as in example 1-4, except that broadcast information and the CSI-RS are different, and therefore their description will be omitted.
  • a control resource set that collides with a CSI-RS can be shifted to an effective resource that does not collide with a CSI-RS. Consequently, the UE does not perform monitoring, decoding process and so forth, for the resource colliding with the CSI-RS, thereby avoiding unnecessary processes.
  • the downlink control channel that is mapped to the colliding control resource set is mapped to a resource (effective resource) that does not collide with the CSI-RS, so that the drop in resource efficiency can be reduced. Furthermore, there is no need to wait for the next control resource set of the colliding control resource set to transmit a downlink control channel, so that the latency in transmission and so on can be reduced.
  • example 4-3 will be described below.
  • a colliding control resource set is shifted in the frequency-axis direction, and prevented from colliding with a CSI-RS ( FIG. 18 ).
  • the behaviors of the network and UE are the same as in example 1-4, except that broadcast information and the CSI-RS are different, and therefore their description will be omitted.
  • a control resource set that collides with a CSI-RS can be shifted to an effective resource that does not collide with a CSI-RS. Consequently, the UE does not perform monitoring, decoding process and so forth, for the resource colliding with the CSI-RS, thereby avoiding unnecessary processes.
  • the downlink control channel that is mapped to the colliding control resource set is mapped to a resource (effective resource) that do not collide with the CSI-RS, so that the drop in resource efficiency can be reduced. Furthermore, there is no need to wait for the next control resource set of the colliding control resource set to transmit a downlink control channel, or there is no need to transmit the downlink control channel in a symbol after the colliding symbol, so that the latency in transmission and so on can be reduced.
  • control resource sets are allocated in a flexible manner, and, even if control resource set and the CSI-RS collide with each other, it is still possible to reduce the decline in the quality of communication, the drop in resource efficiency and so forth.
  • control resource sets are allocated to overlap each other.
  • multiple types of control resource sets may be configured in UEs or UE groups. Consequently, as illustrated in FIG. 19 , different control resource sets may be allocated to overlap each other.
  • FIG. 19 illustrates a state of allocation, in which different control resource sets are allocated to overlap each other, partially, in the first and third symbols.
  • UE performs monitoring on the assumption that there is no overlap in any of the control resource sets.
  • the UE monitors PDCCH candidates/search spaces for each control resource set.
  • the network may transmit a downlink control channel using a preferred control resource set among a plurality of control resource sets.
  • a preferred control resource set can be used depending on the communication quality or the state of allocation (such as the frequency of configuration) of each control resource set. As a result of this, the decline in the quality of communication, the drop in resource efficiency and so forth can be reduced.
  • radio communication system communication is performed using 1 of the radio communication methods according to the herein-contained embodiments of the present invention, or a combination of these.
  • FIG. 20 is a diagram to illustrate an exemplary schematic structure of a radio communication system according to one embodiment of the present invention.
  • a radio communication system 1 can adopt carrier aggregation (CA) and/or dual connectivity (DC) to group a plurality of fundamental frequency blocks (component carriers) into one, where the LTE system bandwidth (for example, 20 MHz) constitutes 1 unit.
  • CA carrier aggregation
  • DC dual connectivity
  • the radio communication system 1 may be referred to as “LTE (Long Term Evolution),” “LTE-A (LTE-Advanced),” “LTE-B (LTE-Beyond),” "SUPER 3G,” “IMT-Advanced,” “4G (4th generation mobile communication system),” “5G (5th generation mobile communication system),” “NR (New Radio),” “FRA (Future Radio Access),” “New-RAT (Radio Access Technology),” and so on, or may be seen as a system to implement these.
  • the radio communication system 1 includes a radio base station 11 that forms a macro cell C1, with a relatively wide coverage, and radio base stations 12a to 12c that are placed within the macro cell C1 and that form small cells C2, which are narrower than the macro cell C1. Also, user terminals 20 are placed in the macro cell C1 and in each small cell C2. The arrangement and number of cells and user terminals 20 are not limited to those illustrated in the drawing.
  • the user terminals 20 can connect with both the radio base station 11 and the radio base stations 12.
  • the user terminals 20 may use the macro cell C1 and the small cells C2 at the same time by means of CA or DC.
  • the user terminals 20 may apply CA or DC using a plurality of cells (CCs) (for example, 5 or fewer CCs or 6 or more CCs).
  • CCs cells
  • the user terminals 20 can communicate by using time division duplexing (TDD) and/or frequency division duplexing (FDD), in each cell. Furthermore, in each cell (carrier), a single numerology may be used, or a plurality of different numerologies may be used.
  • TDD time division duplexing
  • FDD frequency division duplexing
  • the radio base station 11 and a radio base station 12 may be connected with each other by cables (for example, by optical fiber, which is in compliance with the CPRI (Common Public Radio Interface), the X2 interface and so on), or by radio.
  • cables for example, by optical fiber, which is in compliance with the CPRI (Common Public Radio Interface), the X2 interface and so on), or by radio.
  • the radio base station 11 and the radio base stations 12 are each connected with higher station apparatus 30, and are connected with a core network 40 via the higher station apparatus 30.
  • the higher station apparatus 30 may be, for example, access gateway apparatus, a radio network controller (RNC), a mobility management entity (MME) and so on, but is by no means limited to these.
  • RNC radio network controller
  • MME mobility management entity
  • each radio base station 12 may be connected with the higher station apparatus 30 via the radio base station 11.
  • the radio base station 11 is a radio base station having a relatively wide coverage, and may be referred to as a "macro base station,” a “central node,” an “eNB (eNodeB),” a “transmitting/receiving point” and so on.
  • the radio base stations 12 are radio base stations having local coverages, and may be referred to as “small base stations,” “micro base stations,” “pico base stations,” “femto base stations,” “HeNBs (Home eNodeBs),” “RRHs (Remote Radio Heads),” “transmitting/receiving points” and so on.
  • the radio base stations 11 and 12 will be collectively referred to as “radio base stations 10,” unless specified otherwise.
  • the user terminals 20 are terminals to support various communication schemes such as LTE, LTE-A and so on, and may be either mobile communication terminals (mobile stations) or stationary communication terminals (fixed stations).
  • orthogonal frequency division multiple access (OFDMA) is applied to the downlink
  • SC-FDMA single-carrier frequency division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single-carrier frequency division multiple access
  • OFDMA is a multi-carrier communication scheme to perform communication by dividing a frequency bandwidth into a plurality of narrow frequency bandwidths (subcarriers) and mapping data to each subcarrier.
  • SC-FDMA is a single-carrier communication scheme to mitigate interference between terminals by dividing the system bandwidth into bands formed with 1 or continuous resource blocks per terminal, and allowing a plurality of terminals to use mutually different bands. Note that, uplink and downlink radio access schemes are not limited to these combinations, and other radio access schemes may be used.
  • a downlink shared channel (Physical Downlink Shared CHannel)
  • a broadcast channel (Physical Broadcast CHannel)
  • downlink L1/L2 control channels and so on are used as downlink channels.
  • User data, higher layer control information, SIBs (System Information Blocks) and so on are communicated in the PDSCH.
  • SIBs System Information Blocks
  • MIB Master Information Blocks
  • the downlink L1/L2 control channels include a PDCCH (Physical Downlink Control CHannel), an EPDCCH (Enhanced Physical Downlink Control CHannel), a PCFICH (Physical Control Format Indicator CHannel), a PHICH (Physical Hybrid-ARQ Indicator CHannel) and so on.
  • Downlink control information (DCI), which includes PDSCH and/or PUSCH scheduling information, is communicated by the PDCCH.
  • scheduling information may be reported in DCI.
  • DCI to schedule receipt of DL data may be referred to as a "DL assignment”
  • DCI to schedule UL data transmission may also be referred to as a "UL grant.”
  • an uplink shared channel (Physical Uplink Shared CHannel)
  • PUCCH Physical Uplink Control CHannel
  • PRACH Physical Random Access CHannel
  • User data, higher layer control information and so on are communicated by the PUSCH.
  • CQI Channel Quality Indicator
  • SRs scheduling requests
  • CRSs cell-specific reference signals
  • CSI-RSs channel state information reference signals
  • DMRSs demodulation reference signals
  • PRSs positioning reference signals
  • SRSs measurement reference signals
  • DMRSs demodulation reference signals
  • uplink reference signals DMRSs
  • UE-specific reference signals user terminal-specific reference signals
  • the reference signals to be communicated are by no means limited to these.
  • FIG. 21 is a diagram to illustrate an exemplary overall structure of a radio base station according to one embodiment of the present invention.
  • a radio base station 10 has a plurality of transmitting/receiving antennas 101, amplifying sections 102, transmitting/receiving sections 103, a baseband signal processing section 104, a call processing section 105 and a communication path interface 106. Note that one or more transmitting/receiving antennas 101, amplifying sections 102 and transmitting/receiving sections 103 may be provided.
  • User data to be transmitted from the radio base station 10 to a user terminal 20 on the downlink is input from the higher station apparatus 30 to the baseband signal processing section 104, via the communication path interface 106.
  • the transmitting/receiving sections 103 may transmit signals using transmitting beams, or receive signals using receiving beams.
  • the transmitting/receiving sections 103 may transmit and/or receive signals using predetermined beams determined by the control section 301.
  • the baseband signal processing section 104 at least has a control section (scheduler) 301, a transmission signal generation section 302, a mapping section 303, a received signal processing section 304 and a measurement section 305. Note that these configurations have only to be included in the radio base station 10, and some or all of these configurations may not be included in the baseband signal processing section 104.
  • the control section (scheduler) 301 controls the whole of the radio base station 10.
  • the control section 301 can be constituted by a controller, a control circuit or control apparatus that can be described based on general understanding of the technical field to which the present invention pertains.
  • the control section 301 controls, for example, generation of signals in the transmission signal generation section 302, allocation of signals in the mapping section 303, and so on. Furthermore, the control section 301 controls signal receiving processes in the received signal processing section 304, measurements of signals in the measurement section 305, and so on.
  • the control section 301 controls the scheduling (for example, resource allocation) of system information, downlink data signals (for example, signals transmitted in the PDSCH) and downlink control signals (for example, signals communicated in the PDSCH and/or the EPDCCH). Also, the control section 301 controls the generation of downlink control signals, downlink data signals and so on, based on the results of deciding whether or not retransmission control is necessary for uplink data signals, and so on. Also, the control section 301 controls the scheduling of synchronization signals (for example, the PSS (Primary Synchronization Signal)/SSS (Secondary Synchronization Signal)), downlink reference signals (for example, the CRS, the CSI-RS, the DMRS, etc.) and so on.
  • synchronization signals for example, the PSS (Primary Synchronization Signal)/SSS (Secondary Synchronization Signal)
  • downlink reference signals for example, the CRS, the CSI-RS, the DMRS, etc.
  • the control section 301 may exert control so that transmitting beams and/or receiving beams are formed by using digital BF (for example, precoding) in the baseband signal processing section 104 and/or analog BF (for example, phase rotation) in the transmitting/receiving sections 103.
  • the control section 301 may exert control so that beams are formed based on downlink propagation path information, uplink propagation path information and so on. These pieces of propagation path information may be obtained from the received signal processing section 304 and/or the measurement section 305.
  • the control section 301 may explicitly command, by using RRC signaling or SIBs, the user terminal 20 not to decode the PBCH included in other cells' SS blocks.
  • the transmission signal generation section 302 generates downlink signals (downlink control signals, downlink data signals, downlink reference signals and so on) based on commands from the control section 301, and outputs these signals to the mapping section 303.
  • the transmission signal generation section 302 can be constituted by a signal generator, a signal generating circuit or signal generating apparatus that can be described based on general understanding of the technical field to which the present invention pertains.
  • the transmission signal generation section 302 generates DL assignments, which report downlink data allocation information, and/or UL grants, which report uplink data allocation information, based on commands from the control section 301.
  • DL assignments and UL grants are both DCI, in compliance with corresponding DCI format.
  • the downlink data signals are subjected to the coding process, the modulation process and so on, by using coding rates and modulation schemes that are determined based on, for example, channel state information (CSI) from each user terminal 20.
  • CSI channel state information
  • the received signal processing section 304 performs receiving processes (for example, demapping, demodulation, decoding and so on) of received signals that are input from the transmitting/receiving sections 103.
  • the received signals include, for example, uplink signals transmitted from the user terminal 20 (uplink control signals, uplink data signals, uplink reference signals, etc.).
  • a signal processor, a signal processing circuit or signal processing apparatus that can be described based on general understanding of the technical field to which the present invention pertains can be used.
  • the received signal processing section 304 outputs the decoded information acquired through the receiving processes, to the control section 301. For example, when a PUCCH to contain an HARQ-ACK is received, the received signal processing section 304 outputs this HARQ-ACK to the control section 301. Also, the received signal processing section 304 outputs the received signals and/or the signals after the receiving processes to the measurement section 305.
  • the measurement section 305 conducts measurements with respect to the received signals.
  • the measurement section 305 can be constituted by a measurer, a measurement circuit or measurement apparatus that can be described based on general understanding of the technical field to which the present invention pertains.
  • FIG. 23 is a diagram to illustrate an exemplary overall structure of a user terminal according to one embodiment of the present invention.
  • a user terminal 20 has a plurality of transmitting/receiving antennas 201, amplifying sections 202, transmitting/receiving sections 203, a baseband signal processing section 204 and an application section 205. Note that one or more transmitting/receiving antennas 201, amplifying sections 202 and transmitting/receiving sections 203 may be provided.
  • Radio frequency signals that are received in the transmitting/receiving antennas 201 are amplified in the amplifying sections 202.
  • the transmitting/receiving sections 203 receive the downlink signals amplified in the amplifying sections 202.
  • the received signals are subjected to frequency conversion and converted into the baseband signal in the transmitting/receiving sections 203, and output to the baseband signal processing section 204.
  • a transmitting/receiving section 203 can be constituted by a transmitters/receiver, a transmitting/receiving circuit or transmitting/receiving apparatus that can be described based on general understanding of the technical field to which the present invention pertains.
  • a transmitting/receiving section 203 may be structured as a transmitting/receiving section in one entity, or may be constituted by a transmitting section and a receiving section.
  • uplink user data is input from the application section 205 to the baseband signal processing section 204.
  • the baseband signal processing section 204 performs a retransmission control transmission process (for example, an HARQ transmission process), channel coding, precoding, a discrete Fourier transform (DFT) process, an IFFT process and so on, and the result is forwarded to the transmitting/receiving sections 203.
  • the baseband signal that is output from the baseband signal processing section 204 is converted into a radio frequency band in the transmitting/receiving sections 203.
  • the radio frequency signals that are subjected to frequency conversion in the transmitting/receiving sections 203 are amplified in the amplifying sections 202, and transmitted from the transmitting/receiving antennas 201.
  • the transmitting/receiving sections 203 may transmit signals using transmitting beams, or receive signals using receiving beams.
  • the transmitting/receiving sections 203 may transmit and/or receive signals using predetermined beams determined by the control section 401.
  • the transmitting/receiving sections 203 receive one or more synchronization signal blocks (SS blocks) that contain synchronization signals (for example, the NR-PSS, NR-SSS, etc.) and a broadcast channel (for example, the NR-PBCH).
  • SS blocks synchronization signal blocks
  • a broadcast channel for example, the NR-PBCH
  • the transmitting/receiving sections 203 receive various downlink signals described in the first to fifth embodiments.
  • FIG. 24 is a diagram to illustrate an exemplary functional structure of a user terminal according to one embodiment of the present invention. Note that, although this example primarily illustrates functional blocks that pertain to characteristic parts of the present embodiment, the user terminal 20 has other functional blocks that are necessary for radio communication as well.
  • the baseband signal processing section 204 provided in the user terminal 20 at least has a control section 401, a transmission signal generation section 402, a mapping section 403, a received signal processing section 404 and a measurement section 405. Note that these configurations have only to be included in the user terminal 20, and some or all of these configurations may not be included in the baseband signal processing section 204.
  • the control section 401 controls the whole of the user terminal 20.
  • a controller, a control circuit or control apparatus that can be described based on general understanding of the technical field to which the present invention pertains can be used.
  • the control section 401 controls, for example, generation of signals in the transmission signal generation section 402, allocation of signals in the mapping section 403, and so on. Furthermore, the control section 401 controls signal receiving processes in the received signal processing section 404, measurements of signals in the measurement section 405, and so on.
  • the control section 401 acquires the downlink control signals and downlink data signals transmitted from the radio base station 10, via the received signal processing section 404.
  • the control section 401 controls the generation of uplink control signals and/or uplink data signals based on the results of deciding whether or not retransmission control is necessary for the downlink control signals and/or downlink data signals, and so on.
  • the control section 401 may exert control so that transmitting beams and/or receiving beams are formed by using digital BF (for example, precoding) in the baseband signal processing section 204 and/or analog BF (for example, phase rotation) in the transmitting/receiving sections 203.
  • the control section 401 may exert control so that beams are formed based on downlink propagation path information, uplink propagation path information, and so on. These pieces of propagation path information may be obtained from the received signal processing section 404 and/or the measurement section 405.
  • the control section 401 controls the control resource set as described in the first to fifth embodiments.
  • the transmission signal generation section 402 generates uplink signals (uplink control signals, uplink data signals, uplink reference signals, etc.) based on commands from the control section 401, and outputs these signals to the mapping section 403.
  • the transmission signal generation section 402 can be constituted by a signal generator, a signal generating circuit or signal generation apparatus that can be described based on general understanding of the technical field to which the present invention pertains.
  • the transmission information generation section 402 generates uplink control signals such as delivery acknowledgement information, channel state information (CSI) and so on, based on commands from the control section 401. Also, the transmission signal generation section 402 generates uplink data signals based on commands from the control section 401. For example, when a UL grant is included in a downlink control signal that is reported from the radio base station 10, the control section 401 commands the transmission signal generation section 402 to generate an uplink data signal.
  • uplink control signals such as delivery acknowledgement information, channel state information (CSI) and so on
  • CSI channel state information
  • the received signal processing section 404 outputs the decoded information acquired through the receiving processes, to the control section 401.
  • the received signal processing section 404 outputs, for example, broadcast information, system information, RRC signaling, DCI and so on, to the control section 401. Also, the received signal processing section 404 outputs the received signals and/or the signals after the receiving processes to the measurement section 405.
  • the measurement section 405 conducts measurements with respect to the received signals.
  • the measurement section 405 can be constituted by a measurer, a measurement circuit or measurement apparatus that can be described based on general understanding of the technical field to which the present invention pertains.
  • the measurement section 405 may perform RRM measurements, CSI measurements, and so on, based on the received signals.
  • the measurement section 405 may measure the received power (for example, RSRP), the received quality (for example, RSRQ, SINR, SNR, etc.), the signal strength (for example, RSSI), propagation path information (for example, CSI) and so on.
  • the measurement results may be output to the control section 401.
  • the radio base station, user terminals and so on may function as a computer that executes the processes of the radio communication method of the present invention.
  • FIG. 25 is a diagram to illustrate an exemplary hardware structure of a radio base station and a user terminal according to one embodiment of the present invention.
  • the above-described radio base stations 10 and user terminals 20 may be formed as a computer apparatus that includes a processor 1001, a memory 1002, a storage 1003, communication apparatus 1004, input apparatus 1005, output apparatus 1006 and a bus 1007.
  • the word “apparatus” may be replaced by “circuit,” “device,” “unit” and so on.
  • the hardware structure of a radio base station 10 and a user terminal 20 may be designed to include one or more of each apparatus illustrated in the drawings, or may be designed not to include part of the apparatus.
  • processor 1001 may be implemented with 1 processor, or processes may be implemented in sequence, or in different manners, on one or more processors.
  • processor 1001 may be implemented with one or more chips.
  • the functions of the radio base station 10 and the user terminal 20 are implemented by allowing hardware such as the processor 1001 and the memory 1002 to read predetermined software (programs), thereby allowing the processor 1001 to do calculations, the communication apparatus 1004 to communicate, and the memory 1002 and the storage 1003 to read and/or write data.
  • predetermined software programs
  • the memory 1002 is a computer-readable recording medium, and may be constituted by, for example, at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically EPROM), a RAM (Random Access Memory) and/or other appropriate storage media.
  • the memory 1002 may be referred to as a "register,” a "cache,” a “main memory” (primary storage apparatus) and so on.
  • the memory 1002 can store executable programs (program codes), software modules and so on for implementing the radio communication methods according to embodiments of the present invention.
  • the input apparatus 1005 is an input device for receiving input from the outside (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor and so on).
  • the output apparatus 1006 is an output device for allowing sending output to the outside (for example, a display, a speaker, an LED (Light Emitting Diode) lamp and so on). Note that the input apparatus 1005 and the output apparatus 1006 may be provided in an integrated structure (for example, a touch panel).
  • bus 1007 so as to communicate information.
  • the bus 1007 may be formed with a single bus, or may be formed with buses that vary between pieces of apparatus.
  • the radio base station 10 and the user terminal 20 may be structured to include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application-Specific Integrated Circuit), a PLD (Programmable Logic Device), an FPGA (Field Programmable Gate Array) and so on, and part or all of the functional blocks may be implemented by the hardware.
  • the processor 1001 may be implemented with at least one of these pieces of hardware.
  • a reference signal may be abbreviated as an "RS,” and may be referred to as a "pilot,” a “pilot signal” and so on, depending on which standard applies.
  • a “component carrier (CC)” may be referred to as a "cell,” a “frequency carrier,” a “carrier frequency” and so on.
  • a radio frame may be comprised of one or more periods (frames) in the time domain.
  • Each of one or more periods (frames) constituting a radio frame may be referred to as a "subframe.”
  • a subframe may be comprised of one or multiple slots in the time domain.
  • a subframe may be a fixed time duration (for example, 1 ms) not dependent on the numerology.
  • a slot may be comprised of one or more symbols in the time domain (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, and so on).
  • a slot may be a time unit based on numerology.
  • a slot may include a plurality of minislots. Each minislot may be comprised of one or more symbols in the time domain. Also, a minislot may be referred to as a "subslot.”
  • a radio frame, a subframe, a slot, a minislot and a symbol all represent the time unit in signal communication.
  • a radio frame, a subframe, a slot, a minislot and a symbol may be each called by other applicable names.
  • 1 subframe may be referred to as a "transmission time interval (TTI)," or a plurality of consecutive subframes may be referred to as a "TTI,” or 1 slot or mini-slot may be referred to as a "TTI.”
  • TTI transmission time interval
  • a subframe and/or a TTI may be a subframe (1 ms) in existing LTE, may be a shorter period than 1 ms (for example, 1 to 13 symbols), or may be a longer period of time than 1 ms.
  • the unit to represent the TTI may be referred to as a "slot,” a "mini slot” and so on, instead of a "subframe.”
  • a TTI refers to the minimum time unit of scheduling in radio communication, for example.
  • a radio base station schedules the radio resources (such as the frequency bandwidth and transmission power that can be used in each user terminal) to allocate to each user terminal in TTI units.
  • the definition of TTIs is not limited to this.
  • the TTI may be the transmission time unit of channel-encoded data packets (transport blocks), code blocks and/or codewords, or may be the unit of processing in scheduling, link adaptation and so on. Note that, when a TTI is given, the period of time (for example, the number of symbols) in which transport blocks, code blocks and/or codewords are actually mapped may be shorter than the TTI.
  • TTI 1 slot or 1 minislot
  • one or more TTIs may be the minimum time unit of scheduling.
  • the number of slots (the number of minislots) to constitute this minimum time unit of scheduling may be controlled.
  • a TTI having a time duration of 1 ms may be referred to as a "normal TTI” (TTI in LTE Rel. 8 to 12), a "long TTI,” a “normal subframe,” a “long subframe,” and so on.
  • a TTI that is shorter than a normal TTI may be referred to as a "shortened TTI,” a “short TTI,” a “partial TTI” (or a “fractional TTI”), a "shortened subframe,” a “short subframe,” a “mini-slot,” a “sub-slot” and so on.
  • a long TTI for example, a normal TTI, a subframe, etc.
  • a short TTI for example, a shortened TTI
  • a TTI length less than the TTI length of a long TTI and not less than 1 ms.
  • a resource block is the unit of resource allocation in the time domain and the frequency domain, and may include one or a plurality of consecutive subcarriers in the frequency domain. Also, an RB may include one or more symbols in the time domain, and may be 1 slot, 1 minislot, 1 subframe or 1 TTI in length. 1 TTI and 1 subframe each may be comprised of one or more resource blocks. Note that one or more RBs may be referred to as a "physical resource block (PRB (Physical RB)),” a “subcarrier group (SCG),” a “resource element group (REG),” a "PRB pair,” an “RB pair” and so on.
  • PRB Physical resource block
  • SCG subcarrier group
  • REG resource element group
  • a resource block may be comprised of one or more resource elements (REs).
  • REs resource elements
  • 1 RE may be a radio resource field of 1 subcarrier and 1 symbol.
  • radio frames, subframes, slots, minislots, symbols and so on described above are merely examples.
  • configurations pertaining to the number of subframes included in a radio frame, the number of slots included per subframe or radio frame, the number of mini-slots included in a slot, the number of symbols and RBs included in a slot or a mini-slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol duration, the length of cyclic prefixes (CPs) and so on can be variously changed.
  • a radio resource may be specified by a predetermined index.
  • information, signals and so on can be output from higher layers to lower layers and/or from lower layers to higher layers.
  • Information, signals and so on may be input and/or output via a plurality of network nodes.
  • the information, signals and so on that are input and/or output may be stored in a specific location (for example, in a memory), or may be managed in a control table.
  • the information, signals and so on to be input and/or output can be overwritten, updated or appended.
  • the information, signals and so on that are output may be deleted.
  • the information, signals and so on that are input may be transmitted to other pieces of apparatus.
  • reporting of information is by no means limited to the examples/embodiments described in this specification, and other methods may be used as well.
  • reporting of information may be implemented by using physical layer signaling (for example, downlink control information (DCI), uplink control information (UCI)), higher layer signaling (for example, RRC (Radio Resource Control) signaling, broadcast information (the master information block (MIB), system information blocks (SIBs) and so on), MAC (Medium Access Control) signaling and so on), and other signals and/or combinations of these.
  • DCI downlink control information
  • UCI uplink control information
  • RRC Radio Resource Control
  • MIB master information block
  • SIBs system information blocks
  • MAC Medium Access Control
  • L1/L2 Layer 1/Layer 2 control signals
  • L1 control information L1 control signal
  • RRC signaling may be referred to as “RRC messages,” and can be, for example, an RRC connection setup message, RRC connection reconfiguration message, and so on.
  • MAC signaling may be reported using, for example, MAC control elements (MAC CEs (Control Elements)).
  • reporting of predetermined information does not necessarily have to be sent explicitly, and can be sent in an implicit way (for example, by not reporting this piece of information, by reporting another piece of information, and so on).
  • Decisions may be made in values represented by 1 bit (0 or 1), may be made in Boolean values that represent true or false, or may be made by comparing numerical values (for example, comparison against a predetermined value).
  • Software whether referred to as “software,” “firmware,” “middleware,” “microcode” or “hardware description language,” or called by other names, should be interpreted broadly, to mean instructions, instruction sets, code, code segments, program codes, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions and so on.
  • software, commands, information and so on may be transmitted and received via communication media.
  • communication media For example, when software is transmitted from a website, a server or other remote sources by using wired technologies (coaxial cables, optical fiber cables, twisted-pair cables, digital subscriber lines (DSL) and so on) and/or wireless technologies (infrared radiation, microwaves and so on), these wired technologies and/or wireless technologies are also included in the definition of communication media.
  • wired technologies coaxial cables, optical fiber cables, twisted-pair cables, digital subscriber lines (DSL) and so on
  • wireless technologies infrared radiation, microwaves and so on
  • system and "network” as used herein are used interchangeably.
  • base station As used herein, the terms “base station (BS),” “radio base station,” “eNB,” “gNB,” “cell,” “sector,” “cell group,” “carrier,” and “component carrier” may be used interchangeably.
  • a base station may be referred to as a “fixed station,” “NodeB,” “eNodeB (eNB),” “access point,” “transmission point,” “receiving point,” “femto cell,” “small cell” and so on.
  • a base station can accommodate one or more (for example, 3) cells (also referred to as "sectors"). When a base station accommodates a plurality of cells, the entire coverage area of the base station can be partitioned into multiple smaller areas, and each smaller area can provide communication services through base station subsystems (for example, indoor small base stations (RRHs (Remote Radio Heads))).
  • RRHs Remote Radio Heads
  • the term "cell” or “sector” refers to part or all of the coverage area of a base station and/or a base station subsystem that provides communication services within this coverage.
  • MS mobile station
  • UE user equipment
  • terminal terminal
  • a base station may be referred to as a "fixed station,” “NodeB,” “eNodeB (eNB),” "access point,” “transmission point,” “receiving point,” “femto cell,” “small cell” and so on.
  • a mobile station may be referred to, by a person skilled in the art, as a "subscriber station,” “mobile unit,” “subscriber unit,” “wireless unit,” “remote unit,” “mobile device,” “wireless device,” “wireless communication device,” “remote device,” “mobile subscriber station,” “access terminal,” “mobile terminal,” “wireless terminal,” “remote terminal,” “handset,” “user agent,” “mobile client,” “client” or some other suitable terms.
  • radio base stations in this specification may be interpreted as user terminals.
  • each aspect/embodiment of the present invention may be applied to a configuration in which communication between a radio base station and a user terminal is replaced with communication among a plurality of user terminals (D2D (Device-to-Device)).
  • user terminals 20 may have the functions of the radio base stations 10 described above.
  • terms such as “uplink” and “downlink” may be interpreted as "side.”
  • an "uplink channel” may be interpreted as a "side channel.”
  • the user terminals in this specification may be interpreted as radio base stations.
  • the radio base stations 10 may have the functions of the user terminals 20 described above.
  • base stations may, in some cases, be performed by their upper nodes.
  • various operations that are performed so as to communicate with terminals can be performed by base stations, one or more network nodes (for example, MMEs (Mobility Management Entities), S-GWs (Serving-Gateways) and so on may be possible, but these are not limiting) other than base stations, or combinations of these.
  • MMEs Mobility Management Entities
  • S-GWs Serving-Gateways
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution
  • LTE-B Long Term Evolution-Beyond
  • SUPER 3G IMT-Advanced
  • 4G 4th generation mobile communication system
  • 5G 5th generation mobile communication system
  • FRA Fluture Radio Access
  • New-RAT Radio Access Technology
  • NR New Radio
  • NX New radio access
  • FX Fluture generation radio access
  • GSM registered trademark
  • CDMA 2000 UMB (Ultra Mobile Broadband)
  • IEEE 802.11 Wi-Fi (registered trademark)
  • IEEE 802.16 WiMAX (registered trademark)
  • IEEE 802.20 UWB (Ultra-WideBand
  • Bluetooth registered trademark
  • references to elements with designations such as “first,” “second” and so on as used herein does not generally limit the number/quantity or order of these elements. These designations are used herein only for convenience, as a method for distinguishing between two or more elements. In this way, reference to the first and second elements does not imply that only 2 elements may be employed, or that the first element must precede the second element in some way.
  • judge and “determine” as used herein may encompass a wide variety of actions. For example, to “judge” and “determine” as used herein may be interpreted to mean making judgements and determinations related to calculating, computing, processing, deriving, investigating, looking up (for example, searching a table, a database or some other data structure), ascertaining and so on. Furthermore, to “judge” and “determine” as used herein may be interpreted to mean making judgements and determinations related to receiving (for example, receiving information), transmitting (for example, transmitting information), inputting, outputting, accessing (for example, accessing data in a memory) and so on.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
EP17913575.1A 2017-06-15 2017-06-15 Terminal d'utilisateur, et procédé de communication sans fil Active EP3641438B1 (fr)

Applications Claiming Priority (1)

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PCT/JP2017/022210 WO2018229951A1 (fr) 2017-06-15 2017-06-15 Terminal d'utilisateur, et procédé de communication sans fil

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EP3641438A1 true EP3641438A1 (fr) 2020-04-22
EP3641438A4 EP3641438A4 (fr) 2020-12-30
EP3641438B1 EP3641438B1 (fr) 2023-12-06

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US (1) US11240819B2 (fr)
EP (1) EP3641438B1 (fr)
JP (1) JP6791611B2 (fr)
KR (1) KR20200015706A (fr)
CN (1) CN110915273B (fr)
BR (1) BR112019026709A2 (fr)
DK (1) DK3641438T3 (fr)
PT (1) PT3641438T (fr)
RU (1) RU2751788C9 (fr)
WO (1) WO2018229951A1 (fr)

Cited By (2)

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WO2021048581A1 (fr) * 2019-09-09 2021-03-18 Orope France Sarl Procédé de détection de canal de commande dans un fonctionnement à large bande
WO2022081053A1 (fr) * 2020-10-14 2022-04-21 Telefonaktiebolaget Lm Ericsson (Publ) Signalisation de données pour réseau de communication sans fil

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US11395338B2 (en) * 2017-07-12 2022-07-19 Samsung Electronics Co., Ltd. Method and apparatus for control resource set configuration for 5G next radio system
CN109600844B (zh) 2017-09-30 2021-08-24 中兴通讯股份有限公司 确定时频资源的方法及装置
CN111066363B (zh) * 2018-08-07 2023-04-18 Lg电子株式会社 节点在无线通信系统中的资源使用方法和使用该方法的装置
US10993264B1 (en) 2019-10-15 2021-04-27 Qualcomm Incorporated Multiplexing channel state information reports in multiple transmit-receive point (TRP) scenarios
US11871405B2 (en) * 2021-07-27 2024-01-09 Qualcomm Incorporated Scheduling parameters for unequal downlink and uplink transmissions
CN113727307B (zh) * 2021-10-15 2023-08-15 西安电子科技大学 基于冲突检测与冲突避免联合的车联网资源选择方法

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US8792426B2 (en) * 2008-03-24 2014-07-29 Qualcomm Incorporated Method and apparatus for resource management in a wireless communication system
US8442069B2 (en) * 2008-04-14 2013-05-14 Qualcomm Incorporated System and method to enable uplink control for restricted association networks
KR20140084103A (ko) * 2011-10-10 2014-07-04 엘지전자 주식회사 무선통신시스템에서 제어정보 송수신 방법 및 장치
CN104737583B (zh) * 2012-09-27 2019-12-27 阿尔卡特朗讯 用于确定物理下行链路控制信道的资源的方法
EP3535940B1 (fr) * 2016-12-07 2021-07-21 LG Electronics Inc. Procédé et appareil de configuration d'un canal de commande pour une nouvelle radio (nr) dans un système de communication sans fil

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021048581A1 (fr) * 2019-09-09 2021-03-18 Orope France Sarl Procédé de détection de canal de commande dans un fonctionnement à large bande
WO2022081053A1 (fr) * 2020-10-14 2022-04-21 Telefonaktiebolaget Lm Ericsson (Publ) Signalisation de données pour réseau de communication sans fil

Also Published As

Publication number Publication date
EP3641438B1 (fr) 2023-12-06
JPWO2018229951A1 (ja) 2020-04-16
WO2018229951A1 (fr) 2018-12-20
KR20200015706A (ko) 2020-02-12
BR112019026709A2 (pt) 2020-06-30
CN110915273B (zh) 2023-11-14
PT3641438T (pt) 2023-12-29
JP6791611B2 (ja) 2020-11-25
RU2751788C1 (ru) 2021-07-16
EP3641438A4 (fr) 2020-12-30
US20210153202A1 (en) 2021-05-20
US11240819B2 (en) 2022-02-01
DK3641438T3 (da) 2024-01-08
RU2751788C9 (ru) 2021-08-17
CN110915273A (zh) 2020-03-24

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